Reginald L. Goodwin's Posts (3024)

Sort by

Nano Space Explorers...

Artist concept of tiny CubeSat Ambipolar Thruster system - CAT. Image: Ben Longmier - University of Michigan

Researchers plan to launch a tiny spacecraft to Earth orbit and beyond within the next 18 months, in a key test of new propulsion technology that could help cut the cost of planetary exploration by a factor of 1,000.

The scientists and engineers are developing a new plasma propulsion system designed for ultrasmall CubeSats. If all goes well, they say, it may be possible to launch a life-detection mission to Jupiter's ocean-harboring moon Europa or other intriguing worlds for as little as $1 million in the not-too-distant future.

"We want to enable new missions that right now cost about $1 billion, or maybe $500 million — to go, for example, explore the moons of Jupiter and Saturn," said project leader Ben Longmier, a plasma physicist and assistant professor at the University of Michigan.

To get the ball rolling, Longmier and his team launched a crowdfunding campaign on the website Kickstarter Thursday (July 4). They hope to raise a minimum of $200,000 by Aug. 5, which should be enough to loft the miniature thruster on its maiden space voyage.

Scientific American: New Space Engine Could Turn Tiny CubeSat into Interplanetary Explorers

Read more…

Eugen Merzbacher...


April 9, 1921 - June 6, 2013

Chapel Hill
Eugen Merzbacher, prominent theoretical atomic and nuclear physicist, former chair of the Physics Department at University of North Carolina at Chapel Hill and co-founder of the Triangle Universities Nuclear Laboratory, died June 6 (Thursday) at UNC Memorial Hospital from complications following surgery. He was 92.

 

Born in Berlin, Germany, he moved with his family to Turkey in 1935, where they remained throughout World War II. It was there that Eugen obtained an undergraduate degree in physics at Istanbul University. In 1947, he immigrated to the United States, and by 1950 had earned his doctorate in physics at Harvard University. He became a naturalized U.S. citizen a short time later.


Trolling about the Internet, I came upon this rather late...unfortunate. Please forgive my negligence. The passing of great minds gives one pause.

Dr. Merzbacher was obviously an immigrant, and one that contributed mightily to this nation and our understanding of Quantum Mechanics and consequentially, the universe (with no small exaggeration). I studied quantum from a slightly older text I still own and cherish with all its highlights, margin notes and "dog ears." Strange how commodified our conversation has become, the only example of immigrants' impact as a group is the mention of one of the two founders of "Google."

 

Professor Merzbacher left a legacy behind him in the form of a text now in its third edition, introducing undergraduate and graduate students in physics to the subject so impactful on our modern era. It is a testiment, of what "good things [used to] come out of NC" (my home state) before its recent lurch into backwardness.


APS link: Eugen Merzbacher

A link to the third edition here; an embed/link of the second below:

Read more…

Dimple BEC...

The dimple trap in action - PW

The first Bose–Einstein condensate (BEC) to be cooled using just lasers has been made by a team in Austria. The process is much simpler, faster and more efficient than previous methods, which involve an extra stage of evaporative cooling. The scientists hope that their breakthrough will lead to more widespread use of BECs in various areas of physics, including atomic clocks and atom lasers.

 

A BEC is a dense cluster of atoms cooled so close to absolute zero that all of the atoms are in a single quantum state and can therefore be described by the same wavefunction. The first pure BEC was made in 1995 by Eric Cornell and Carl Wieman at JILA in Boulder, Colorado. Since then, BECs have been used – or proposed for use – to create atom circuits, rotation sensors, atom lasers and other novel devices.

 

Making a BEC traditionally involves the two-step cooling of a cloud of atoms contained in a magnetic trap. The first step is laser cooling. It involves choosing an electronic transition of the atom to be cooled and irradiating the atom cloud with laser light of an energy slightly below this transition. For the most energetic atoms trying to climb out of the trap, the laser light is blue-shifted to the transition frequency. These atoms can therefore absorb a photon, which pushes them back. It also promotes the atoms into the excited state. When the atom decays back to the ground state, it emits a photon of a higher energy than the one it absorbed. The overall effect is that the gas cools and becomes denser.

 

Physics World: Laser-cooled Bose-Einstein condensate is a first

Read more…

Bench Warmers...

Credit: Unidentified Appellation

bench warmer is the last thing any high school or college athlete ever wants to be. The person that "shows up"; always there; parents in the audience steaming because their kid didn't get any play on the court or field. Resentful when time is finally granted, they typically become a self-fulfilling prophesy of disaster, and promptly sat back down to sulk the rest of the game/season.

We can't afford that now, nor could we ever.

Our technological innovation is screaming past us literally at light speed. We're demanding faster, cheaper, more apps meaning smaller physical features in Silicon: FinFETs, Carbon Nanotubes - pushing towards and beyond the Moore's Law limit - needing less humans to design or manufacture it. Or at least, less of them in the USA. We need a real debate on these issues; not delay/stalling tactics that in a real game bore to tears, and everyone in the crowd goes home (accept the frustrated parents). No wonder congressional approval is slightly above snail sweat. Getting ye old standardized test scores up - "teaching to the test" ("we don't do that") is insane when all the other industrialized nations whipping our collective assets (as we sit on them) aren't doing it quite that way.

Socially, technologically we can't be bench warmers. As we go, so does the world. If the issue is employment hovering at 7 - 7.5% here, it's only exacerbated in other countries trying to "follow our lead." The season I used metaphorically is our current condition globally, our definitions of "unemployment" and none for "under-employment," or what "full employment" looks like going forward; our continuance of a moribund stratification and unequal social and educational system straight from 1953; our collective shoulder-shrug that other countries are coming on the academic court and running the boards on us.

And for the countries that are imitating us, they too, can't afford bench warmers...

Patrick Mylund Nielson: Our Technological Adolescence
OECD: Indicators 2012
Read more…

A Golden Age...


From the site: NSBP member, Dr. Chanda Prescod-Weinstein, and colleagues discuss whether or not astronomy is in a golden age with Nobel Laureates Brian Schmidt and John Mather

 

From Wikipedia: The term Golden Age (Greek: Χρυσόν Γένος Chryson Genos) comes from Greek mythology and legend and refers to the first in a sequence of four or five (or more) Ages of Man, in which the Golden Age is first, followed in sequence, by the Silver, Bronze, Heroic, and then the present (Iron), which is a period of decline. By extension "Golden Age" denotes a period of primordial peace, harmony, stability, and prosperity. During this age peace and harmony prevailed, humans did not have to work to feed themselves, for the earth provided food in abundance. They lived to a very old age with a youthful appearance, eventually dying peacefully, with spirits living on as "guardians". Plato in Cratylus (397 e) recounts the golden race of humans who came first. He clarifies that Hesiod did not mean literally made of gold, but good and noble.

 

"Good and noble"...I wonder.

 

I'm not faulting the lecturers nor the audience. For there to be an actual "golden age" as has been defined in several cultural references, there needs to be a recognition of the impact of astronomy as the mother science; it is the oldest form of asking the question why and seeking answers. A primitive form of it is what guided the Magi; our reptilian brains, so conditioned to not accept things "new"; authoritarians threatened by concepts that would challenge their rule typically control public opinion on the emphasis, conclusions or the truth research reveals.

 

I'm still waiting for the Vatican to clear this little matter up. Not Catholic, it just quite understandably bothers me...

 

Galileo's indictment (still in effect):

1. The proposition that the sun is in the center of the world and immovable from its place is absurd, philosophically false, and formally heretical; because it is expressly contrary to Holy Scripture.

2. The proposition that the earth is not the center of the world, nor immovable, but that it moves, and also with a diurnal action, is also absurd, philosophically false, and, theologically considered, at least erroneous in faith.

 

Therefore ..., invoking the most holy name of our Lord Jesus Christ and His Most Glorious Mother Mary, We pronounce this Our final sentence: We pronounce, judge and declare, that you, the said Galileo ... have rendered yourself vehemently suspected by this Holy Office of heresy, that is, of having believed and held the doctrine (which is false and contrary to the Holy and Divine Scriptures) that the sun is the center of the world, and that it does not move from east to west, and that the earth does move, and is not the center of the world; also, that an opinion can be held and supported as probable, after it has been declared and finally decreed contrary to the Holy Scripture.

 

"...Science is a reliable method for creating knowledge, and thus power...science constantly disrupts hierarchical power structures and vested interests in a long drive [by science] to give knowledge, and thus power, to the individual, and that process is also political."

 

Fool Me Twice - Fighting the Assault on Science in America, Shawn Lawrence Otto

Read more…

Relativity Speaking...

Science Universe blog

Einstein is lauded for Special and General Relativity, but he stood on the shoulders of giants before him: Sir Isaac Newton, James Clerk Maxwell, Albert Abraham Michelson and Edward Williams Morley; Minkowski, Joseph Larmor, Hendrick Antoon Lorentz and Jules Henri Poincaré.

1898

Jules Henri Poincaré said that "... we have no direct intuition about the equality of two time intervals."

1904

Poincaré came very close to special relativity: "... as demanded by the relativity principle the observer cannot know whether he is at rest or in absolute motion."

1905

On June 5, Poincaré finished an article in which he stated that there seems to be a general law of Nature, that it is impossible to demonstrate absolute motion. On June 30, Einstein finished his famous article On the Electrodynamics of Moving Bodies, where he formulated the two postulates of special relativity. Furthermore, in September, Einstein published the short article Does the Inertia of a Body Depend upon Its Energy-Content? In which he derived the formula E0=mc2.

1905 being Einstein's annus mirabilis (Latin: Year of Wonders), which contributed to his considerable celebrity and our understanding of the universe.

Forgive the history lesson. In other areas of my life, I run into what I like to term "walls of willed ignorance," especially when I'm cornered in a social setting as "the science guy" on a question I'm sincerely not thinking about at the particular moment, or at least can't recall as quickly as "The Google": literally a Hail Mary out of "left field." (Clarification: the question was about quantum mechanics, but I decided to go here 1st - more next Sunday.) I do know when to call BS on persons that merely want to hear themselves pontificate and perform, versus inform. Thus, here is my info for the "walls" and their next spellbinding performance...

Nobel Prize: History of Special Relativity
Physics arXiv: Henri Poincaré and Relativity Theory, by A. A. Logunov

Read more…

Orca...

Organizational Relationship and Contact Analyzer - ORCA

TECHNOLOGY REVIEW: In the last 10 years or so, researchers have revolutionised the way military analysts think about insurgency and the groups of people involved in it. Their key insight is that insurgency tends to run in families and in social networks that are held together by common beliefs.



So it makes sense to study the social networks that insurgents form. And indeed that’s exactly what various military analysts have begun to do, including those in the US Army. A few years ago, a group of West Point cadets and offices developed some software for gathering information about the links between the people who make and distribute improvised explosive devices.



Now the US Army is adapting this technology to help the police tackle gang violence. Damon Paulo and buddies at the US Military Academy at West Point say there are a number of similarities between gang members and insurgents and that similar tools ought to be equally effective in tackling both.



To that end, these guys have created a piece of software called the Organizational, Relationship, and Contact Analyzer or ORCA, which analyses the data from police arrests to create a social network of links between gang members.

Realizing this evolution in technology was inevitable, some of what else the article said disturbed me:

“Police officers working in the district have told us that gangs of Racial Group A are known for a more centralized organizational structure while gangs of Racial Group B have adopted a decentralized model,” say Paulo and co adding that the results of their analysis seem to clearly show this.

The team is currently working to introduce a software in a major metropolitan police department throughout the summer of 2013.

Read that as: New York City, and a "scientific reason" for the continuance of "stop and frisk" and profiling...

Physics arXiv:
How Military Counterinsurgency Software Is Being Adapted To Tackle Gang Violence in Mainland USA
Related link: StreetGangs.com

Read more…

Hawking...


At 2:05 of the trailer, you'll see the words: "behind the world's greatest mind."

Granted, I'm looking forward to this documentary as any geeked physics major would be. I do take some pause to the trailer coining Professor Hawking the title of "greatest mind." He is a great mind, to be sure. The whole "G.O.A.T." thing is a bit of hyperbole to me.

He's overcome quite a lot of obstacles in his harried life, one of which is the shear act of living beyond the original expectations of his lifespan shortened by his disability.

He shows the famous British resolve: "stiff upper lip" determination. I did read "A Brief History of Time" and enjoyed it. I am familiar with the following I saw on Wikipedia:

"Among his significant scientific works have been a collaboration with Roger Penrose on gravitational singularities theorems in the framework of general relativity, and the theoretical prediction that black holes emit radiation, often called Hawking radiation. Hawking was the first to set forth a cosmology explained by a union of the general theory of relativity and quantum mechanics. He is a vocal supporter of the many-worlds interpretation of quantum mechanics.



"He is an Honorary Fellow of the Royal Society of Arts, a lifetime member of the Pontifical Academy of Sciences, and a recipient of the Presidential Medal of Freedom, the highest civilian award in the United States. Hawking was the Lucasian Professor of Mathematics at the University of Cambridge between 1979 and 2009."

 

He had a great science fiction series and several other shows on the Science Channel I enjoyed. Dr. Hawking has lost some scientific wagers though: with Kip Thorne; a "black hole war" with Leonard Susskind and Gerard t'Hooft; most recently with Peter Higgs (of the Higgs Boson).


Professor Hawking is a remarkable man, but still a man, therefore fallible as we all are. To put him on a pedestal does him a disservice, and makes the attainment of a degree in physics or STEM fields the area that is "off limits"; "not normal"; "beyond human capability." I assure you it is not, and as a species, we should get out of boxing ourselves into the "us-versus-them": normals and nerds. Hence my objection to the trailer is in trying to get you to look at it...many may sadly look away.

This is a strange, dichotomous post after Independence Day. I sincerely hope you enjoyed BBQ in moderation and fireworks safely.

I'll still enjoy the documentary, as I hope you do too, mentally filtering hyperbole.
Read more…

Nobel...



Alfred Bernhard Nobel (21 October 1833 – 10 December 1896) was a Swedish chemist, engineer, innovator, and armaments manufacturer. He was the inventor of dynamite. Nobel also owned Bofors, which he had redirected from its previous role as primarily an iron and steel producer to a major manufacturer of cannon and other armaments. Nobel held 350 different patents, dynamite being the most famous. He used his fortune to posthumously institute the Nobel Prizes. The synthetic element nobelium was named after him. His name also survives in modern-day companies such as Dynamit Nobel and Akzo Nobel, which are descendants of the companies Nobel himself established...In 1888 Alfred's brother Ludvig died while visiting Cannes and a French newspaper erroneously published Alfred's obituary.[1] It condemned him for his invention of dynamite and is said to have brought about his decision to leave a better legacy after his death.[1][8] The obituary stated, Le marchand de la mort est mort ("The merchant of death is dead")[1] and went on to say, "Dr. Alfred Nobel, who became rich by finding ways to kill more people faster than ever before, died yesterday."[9] Alfred was disappointed with what he read and concerned with how he would be remembered.

 

On 27 November 1895, at the Swedish-Norwegian Club in Paris, Nobel signed his last will and testament and set aside the bulk of his estate to establish the Nobel Prizes, to be awarded annually without distinction of nationality. Wikipedia

The actual web site for the Nobel Prize appears to be down at the moment...


As I walked into the fab I work at, I heard the sound of firecrackers in the distance. Granted, they predate Alfred by several centuries, but the loud banging, the revelry will ensue again tomorrow as I come into work. There is a relation to Nobel, this posting and the 4th.

No one is going to use dynamite thankfully (unless earnestly competing for the Darwin Awards), but in 2011 an estimated 9,600 people were injured by firecrackers according to the Consumer Products Safety Division; some far worse than just injury.

 

Worry not only how you will be remembered, but how you will proceed through life until its end. Personally, I want to check out with the same digits and body parts I checked in with (a little worse for the wear, understandably).

Read more…

Quantum Remote Control...

...and, physicists know how to do it! ~!!!~



TECHNOLOGY REVIEW: Teleportation is one of the more extraordinary phenomena in the quantum world. It allows a quantum object, such as a photon or electron, to travel from one location to another without passing through the space in between.



Teleportation is a standard procedure in any decent quantum mechanics laboratory. Physicists use it on a daily basis for quantum communication and quantum computation.



If that sounds exotic, you ain’t seen nothing yet; teleportation is about to get a whole lot weirder. That’s because until now, physicists have only been able to teleport single particles, one at a time. Today, Christine Muschik at the Mediterranean Technology Park in Barcelona and a bunch of mates say they’ve worked out how to teleport quantum stuff continuously.



That will allow them to manipulate one quantum particle while watching the effects occur in another particle elsewhere. That’s essentially quantum remote control.

 

Physics arXiv:
Quantum Teleportation of Dynamics and Effective Interations between Remote Systems

Read more…

TSOM...

These three-dimensional tri-gate (FinFET) transistors are among the 3-D microchip structures that could be measured using through-focus scanning optical microscopy (TSOM) - Courtesy, Intel Corporation

Contact: Chad Boutin

301-975-4261



A technique developed several years ago at the National Institute of Standards and Technology (NIST) for improving optical microscopes now has been applied to monitoring the next generation of computer chip circuit components, potentially providing the semiconductor industry with a crucial tool for improving chips for the next decade or more.



The technique, called Through-Focus Scanning Optical Microscopy (TSOM), has now been shown able to detect tiny differences in the three-dimensional shapes of circuit components, which until very recently have been essentially two-dimensional objects. TSOM is sensitive to features that are as small as 10 nanometers (nm) across, perhaps smaller—addressing some important industry measurement challenges for the near future for manufacturing process control and helping maintain the viability of optical microscopy in electronics manufacturing.

 

NIST:
Microscopy Technique Could Help Computer Industry Develop 3-D Components

Read more…

A Nobel Twofer...

A Student’s Guide to Einstein’s Major Papers, Robert E. Kennedy, Oxford U. Press, New York, 2012. $45.00 (296 pp.). ISBN 978-0-19-969403-7



Physics professors often refer to Albert Einstein’s work when teaching relativity, quantum mechanics, or statistical mechanics. I have never given his original papers to my students to supplement their learning, but that will change. I appreciate the importance of having undergraduates read classic and original physics literature, and I have tried to inspire my experimental physics students by assigning Albert Michelson’s 1880 description of his measurement of the speed of light or Robert Millikan’s 1911 oil-drop paper. I have egged the students on to try and do better than Michelson or Millikan using modern technology.



Some of Einstein’s classic papers could also motivate undergraduates, if the physics were fully explained. For instructors who choose to expose their students to Einstein’s scientific articles, Robert E. Kennedy’s A Student’s Guide to Einstein’s Major Papers will be a welcome supplement. Kennedy focuses on Einstein’s four classic papers published in the annus mirabilis of 1905, his doctoral thesis (published in 1906), and his 1916 general relativity paper.

 

Lectures on Quantum Mechanics, Steven Weinberg, Cambridge U. Press, New York, 2013. $75.00 (358 pp.). ISBN: 978-1-107-02872-2



Steven Weinberg, a Nobel laureate for his contributions to the standard model of elementary particles, has a well-deserved reputation as a writer who draws on great depths of physical insight to produce exceptionally clear prose. Until now, his books have been intended either for a general or advanced audience. For general readers, his books include The First Three Minutes: A Modern View of the Origin of the Universe (Basic Books, 1977) and Lake Views: This World and the Universe (Harvard University Press, 2010). For advanced readers, he has written Gravitation and Cosmology (Wiley, 1972), the three-volume Quantum Theory of Fields (Cambridge University Press, 2000), and Cosmology (Oxford University Press, 2008).



Weinberg now turns his attention to a core subject in physics with Lectures on Quantum Mechanics, a text based on a year-long course he has taught to first-year graduate students. The book begins with a 27-page “Historical Introduction” that concisely and elegantly summarizes the development of quantum physics, including an explication of Werner Heisenberg’s matrix mechanics and its equivalence to Erwin Schrödinger’s wave mechanics. We also find some little-known historical tidbits, such as who coined the word “photon.”

Celebrities, sports stars...bah. I have an autographed copy of "The First Three Minutes" (hardcover) and met Professor Weinberg. Nope...not parting with it. You won't find it on E-bay. Willing it to my heirs...Smiley
Read more…

NEXT...

Ion propulsion drive - NASA

CLEVELAND - A NASA advanced ion propulsion engine has successfully operated for more than 48,000 hours, or 5 and a half years, making it the longest test duration of any type of space propulsion system demonstration project ever.

 

The thruster was developed under NASA's Evolutionary Xenon Thruster (NEXT) Project at NASA's Glenn Research Center in Cleveland. Glenn manufactured the test engine's core ionization chamber. Aerojet Rocketdyne of Sacramento, Calif., designed and built the ion acceleration assembly.

 

The 7-kilowatt class thruster could be used in a wide range of science missions, including deep space missions identified in NASA's Planetary Science Decadal Survey.


This is a gridded electrostatic ion thruster, so it uses the Coulomb force to accelerate the Xenon ions in the direction of the electrostatic field. OK, it's not Warp Drive, but they are working on that too. Chemical rockets will not allow us to even explore the solar system in reasonable time spans, and we're too consumed with immediate gradification/ROI (return on investment) to stomach missions that could take months, decades or centuries - those being one-way trips obviously.

 

NASA: NASA Thruster Achieves World-Record 5+ Years of Operation

Read more…

Why Physics...



Honestly for myself, it was a challenge and the hardest thing "on the yard" I could think to study. It was an excuse as a young man to dress strangely, taking full advantage of the "socially inept Nerd" myth - walking around in an Army field jacket and a floppy yellow hat (I sadly still own) - and construct a wall between myself and others. I can see where that was off-putting and not helpful in getting more to at least have an appreciation for science. My mea culpa.

Physics requires a curiosity about how things work: I initially and admittedly, don't or won't know an answer (s), and through trial and a lot of error, I'll eventually figure out whatever is the problem. (That didn't work out too well for a few watches and clocks my parents owned.) Hence, buying me chemistry sets, a microscope, telescope and a toolkit was their way to channel my otherwise destructive impulses into something creative and less property-damaging!

It requires persistence, and frankly a kind of mental fortitude in that it's OK not to know the answer: it's having the courage to ask the question and pursue what might be initially fruitless paths. The lab notebook is your friend! I am in no way dismissing the fear people feel when they come up to a formidable task (or, at least one they feel is). If this blog does anything, I hope it encourages you to ask questions. Life is not pre-packaged with the contents known. We may never have all the answers, but we should not fear - nor be discouraged by bullies or authoritarian dogma - from asking questions.

I think for many, especially women and minorities, the "norms" of behavior are channeled early into other areas more acceptable to the social order and less threatening to the status quo: questions imply opposition.

As a whole, the American culture of phone apps, Google, downloads, microwave meals and popcorn, drive through restaurants and instant, 24-hour access to information has jaded our sense of adventure; the Romanticism of a really tough problem and the sheer JOY of solving it. Ironically, it was advances in applied physics that allow us to be so jaded. However, for those whom the adventure is everyday in the lab, pouring over notebooks and papers, staring at experiments, computer programs, circuit boards or stars, it's what keeps physicists, scientists and engineers up at night: their love affair with knowledge and discovery. It is how we all advance and survive as a species.

And, things are looking particularly good for physics students right now...

Smiley

American Institute of Physics: US Physics Degrees Reach an All-Time High
American Physical Society: Why Study Physics?

Read more…

Tribal STEM...



Salish Kootenai College (SKC) is a four-year college located on the Flathead Indian Reservation in western Montana. It is one of 32 fully-accredited US colleges and universities in which at least 51% of students are enrolled in federally recognized tribes.



The US Department of Education classifies these higher education institutions as TCUs (tribal colleges and universities). Most of the TCUs are chartered and controlled by tribal governments. Three are controlled by the US Bureau of Indian Affairs. The Confederated Salish and Kootenai Tribes govern SKC.



The first TCUs were established in the late 1960s and early 1970s, and initially these institutions focused on vocational education programs. Although vocational training remains an important part of their mission, TCUs also offer a growing number of two- and four-year science, technology, engineering, and mathematics (STEM) degrees.



SKC awarded its first four-year STEM degree, in environmental science, in 1997. Since then, SKC has added baccalaureate programs in computer engineering, forestry, hydrology, information technology, life science, and secondary science education. The programs aim to provide additional career opportunities, and to promote long-term economic development of reservation communities. Today's STEM graduates will be tomorrow's entrepreneurs who provide economic opportunities for tribal members. Economically-strong tribal communities help preserve the cultures, languages, histories, and natural environment of their constituents.




In many ways, SKU's programs mirror the curricula one finds at non-TCUs. But they also incorporate traditional indigenous knowledge of the natural world and pedagogical approaches that reflect tribal cultural norms. They emphasize a teamwork approach, and they focus on strategies to improve quality of life and preserve natural environments. SKC STEM faculty members generally view traditional indigenous worldviews to be complementary to, rather than in conflict with, Western science.

 

 

 

Physics Today POV: Teaching science and engineering at a tribal college

Read more…

The Science of Beatboxing...


As a young man, exposed to the first rap song - The Fatback Band: King Tim III - Personality Jock, and the first rap album, The Sugar Hill Gang (all in the same crazy week, mind you) - I could never do it, but it's nice to see someone has actually studied it.

However, as evidenced from the Large Hadron Collider rap... ahem, the physicists would need a few more decades of practice to master it (my humble opinion).

Many of the same mechanisms observed in human speech production were exploited for musical effect, including patterns of articulation that do not occur in the phonologies of the artist's native languages: ejectives, clicks and implosives.

Image credit: 

USC SPAN Group


Rights information: 

The scientists found the beatboxer, a speaker of American English and Panamanian Spanish, was able to generate a wide range of sound effects that do not appear in either of the languages he spoke. Instead, they appeared similar to clicks seen in African languages such as Xhosa from South Africa, Khoekhoe from Botswana, and !Xóõ from Namibia, as well as ejective consonants — bursts of air generated by closing the vocal cords — seen in Nuxálk from British Columbia, Chechen from Chechnya and Hausa from Nigeria and other countries in Africa.

 

"A key finding of our work is to show that we can describe the basic sounds used by the artist with the same system used to describe speech sounds, which suggests that there is a common inventory of sounds that are drawn upon to create any vocal expression," Proctor said.

 

The research also sheds light on the human ability to emulate sounds, and on how the human instincts for music and language can overlap and converge. Also, "learning more about beatboxing and other forms of vocal musical expression may offer insights into novel future speech therapy," Narayanan said.

 

Inside Science: The Science Behind 'BeatBoxing'

Read more…

Outsmarting Heisenberg...



Laser interferometers detect tiny distance changes with high precision. Stray light reduces and limits the measurement accuracy of these instruments. Researchers at the Albert Einstein Institute in Hannover have now shown for the first time how to discriminate between measurement signal and stray light using lasers with tailored quantum properties. The novel measurement concept circumvents the Heisenberg uncertainty principle and could enhance the precision of gravitational-wave detectors like GEO600 or the closely cooperating Advanced LIGO (aLIGO) detectors in the USA.

 

The scientists at the Albert Einstein Institute (AEI; Institute for Gravitational Physics at Leibniz Universität Hannover and Max Planck Institute for Gravitational Physics) in Hannover are hunting for elusive gravitational waves—a prediction from Einstein's general theory of relativity. Their first direction detection will open a new window to our Universe and usher in the era of gravitational-wave astronomy. The AEI researchers aim to detect these tiny space-time ripples using detectors like GEO600 near Hannover, Germany, and aLIGO in the U.S. These detectors use lasers to measure the tiny distance changes caused by passing gravitational waves. Thus, the continuous improvement of those lasers and the minimization of disturbances like stray laser light is of great importance.

 

R&D Mag: Outsmarting Heisenberg

Read more…

Nosce te ipsum II

For my sons...



West African: 82%

Senegal, Mauritania, Mali, Niger, Nigeria, Cameroon, Ghana, Gabon, Congo, and various other nations along Africa's west coast, from The Gambia to the Equatorial Guinea

Scandinavian: 13%

Denmark, Norway, Sweden, Finland, Greenland, Iceland

Uncertain: 5%

Most likely, Cherokee (credit: mom/grandma)

About Your Region

Your ethnicity indicates that you have ancestry from West Africa, an area that stretches along the continent's Atlantic coast from the desolate sands of the Sahara in Mauritania and Mali to the humid canopies of the central African rain forests in Gabon and Congo. Camel caravans once hauled rock salt from desert mines through the legendary city of Timbuktu. And it's the only place on Earth where you can see a lowland gorilla outside of a zoo.

The people of this region trace their ethnic and cultural roots to numerous different sources. The Tuareg Berbers in the predominantly Muslim north are descended from the desert nomads of the Sahara; the sub-Saharan African populations including the Hausa, Mandinka, and Youruba are descendents of the ancient western kingdoms that dominated the region before the arrival of European colonists; the Baka of Cameroon and Gabon, previously referred to as "pygmies," are some of the oldest residents of the area; and the Bantu language group, which originated in Cameroon, is spoken across the entire southern half of the continent.

European colonialism and exploitation, including a centuries-long slave trade, as well as brutal civil wars, despotism, and uncontrolled governmental corruption in the post-colonial era have kept the region mired in poverty. Since the end of Liberia's second civil war in 2003, the region has seen a stretch of relative peace and a decrease in corruption. Hopefully the future will bring prosperity to this region.

Migrations into this region

Western Africa was first occupied by modern humans about 50,000 years ago. More recently, the colonial period saw immigrants from many European countries establish colonies and trading posts throughout Western Africa. However, the genetic impact of these historical Europeans is thought to be very small.

Migrations from this region

The majority of African-Americans ancestry derives from Western Africa. This is mostly because during the Atlantic slave trade of the 18th and 19th centuries, African slaves from the coastal regions of Western Africa were captured and shipped to the Americas. Even groups further inland were sometimes captured and traded out to the coast for slavery.
Read more…